Brandon Roofers helps homeowners in Weeting identify flat roof problems early and fix them properly before water gets a chance to cause serious damage.
Flat roofs do not actually fail overnight. The signs build up over months or even years, and knowing what to look for can save you from a much larger repair bill. The most common reason a flat roof fails early is poor installation - incorrect detailing around edges, outlets and upstands lets water find a way in long before the membrane itself wears out.
A well-installed flat roof, using a quality material and properly dressed flashings, should give you many years of trouble-free service. The problems that show up prematurely almost always trace back to one of a handful of causes.
Some standing water after heavy rain is normal on a flat roof and should drain within 24 to 48 hours. If water is still sitting there days later, the roof either lacks adequate falls or the outlet is blocked or incorrectly positioned. Persistent ponding accelerates the breakdown of felt and puts weight-load stress on the deck beneath it. Left alone, this leads to deck rot and eventually a leak into the room below.
The fix is not always a full replacement. Sometimes re-forming the falls with tapered insulation, or clearing and repositioning a blocked outlet, solves the problem. A proper inspection will tell you which it is.
Blistering on a felt roof means moisture is trapped between layers and expanding in warm weather. It looks dramatic but does not always mean the roof is letting in water yet. However, a blister that is walked on or that cracks will open a direct path for rain. Blistering on an older felt roof often signals that the felt has reached the end of its serviceable life and patching will only delay the inevitable.
EPDM rubber membranes do not blister in the same way, which is one reason they tend to outperform traditional felt on domestic flat roofs.
Flashings are the lead or code-metal strips that seal the junction between the flat roof membrane and a wall, parapet or chimney. They are also the most common point of failure on an otherwise sound roof. Frost causes mortar to crack, wind can lift an edge that was not fully secured, and old lead flashings become brittle over time.
A flashing failure does not mean you need a new roof - it often means a skilled roofer needs to re-dress or replace the flashing and re-point it into the brickwork. Catching this early prevents the water track from spreading across the deck.
A brown tide mark on your ceiling, peeling paint on a top-floor wall, or a musty smell in a room below the flat roof are all signs that water has already found a way through. By the time you see these internally, the leak has usually been running for some time. Water travels horizontally across a deck before it drops, so the entry point is often not directly above the stain.
Do not simply replaster over the damp patch. The source of the water must be found and fixed first, or the problem will return within months.
On a felt roof, splits appear where the felt has dried out and lost its flexibility - typically along a seam or where the roof meets a raised edge. A split allows direct entry for rainwater and needs to be addressed promptly. On very old felt roofs with multiple splits, patching becomes uneconomical and a full re-roof using EPDM or a modern multi-layer felt system is the better long-term decision.
Most flat roof failures come down to four causes:
A flat roof in generally sound condition with one or two localised faults is a strong candidate for repair. A roof with widespread blistering, multiple splits, soft decking or flashings that have failed in several places is better replaced in full. Repeated patching on a worn-out roof costs more over five years than a single re-roof done properly.
When getting quotes, ask the roofer to inspect the deck as well as the surface. A new membrane laid over a failing deck will not last.
We carry out flat roof repairs and full replacements in Weeting and the surrounding area. Whether you have spotted a warning sign or already have a drip coming through, call us to arrange a roof survey so we can give you an honest assessment of what the roof actually needs.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
